Re: [Paparazzi-devel] help on the new version of autopilot

[C Kuo]

Hi Michel


  Thanks alot for the quick reply, I now fully understand what you have done,
and at moment I am also doing some drawing on my own so I could print it out
within my university(not too much imporve in the performance, but may be more
user friendly ), hope it works :)

many thanks


                                                                      Chen

Quoting Michel GORRAZ <address@hidden>:

> Hi Chen,
> 
> The reset pin of the GPS receiver (GPS_RESET) is connected to a GPIO of the
> LPC (P1.21) and also to pin #5 of the "Download" connector.
> This signal is active low and can be used for :
> 1) reset the GPS  with the LPC if needed
> 2) disable GPS receiver serial bus pins (TXD1 & RXD1 -> high impedance).
> In this state, pin #6 (LPC_TXD0) and # 7 (LPC_RXD0) of the "Download"
> connector are ready to be used for bootloader programming (or external GPS
> receiver connecting )
> 
> WARNING : NEVER hold GPS_RESET signal high (more than 1.95v) = GPS reset pin
> will be destroyed !
> (sorry, i will fix that on the next version)
> 
> So :
> - If unused (common case), leave "Download" connector pin #5 unconnected and
> set P1.21 of the LPC as an input
> - if you need to reset the GPS, always hold P1.21 value low and work only
> with GPIO direction register : input = enable GPS , output = reset GPS
> - for bootloader programming, ground "Download" connector pin #5 and proceed
> with the standard bootloader programming procedure.
> 
> LPC_RESET is no more available on a connector : if you want to reset the
> autopilot, just turn the power off then on :)
> 
> @+
> Michel
> 
> 2007/12/10, C Kuo <address@hidden>:
> >
> > Hi there
> >
> >   My name is Chen (the guy from Sheffield UK), after I studied on the
> > design of
> > Tiny 2.1, I have some question I would like to ask (hope you guys don¡¦t
> > mind
> > ļ)
> >
> >   GPS_RESET is connect to GPIO on the LPC2148 in this version (where it
> > left
> > open on the Tiny 1.3), however, I can¡¦t see where LPC_RESET connect to on
> > the
> > sch diagram, is it left open in this version (In tiny 1.3, LPC_RESET is
> > connect
> > to Serial 1)?
> >
> > Thanks
> >
> >
> >                                                         Chen
> >
> >
> >
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> >
>